US20090192460A1 - Device with pressure-actuated pistons for dispensing a multiple syringe or multiple cartridge - Google Patents
Device with pressure-actuated pistons for dispensing a multiple syringe or multiple cartridge Download PDFInfo
- Publication number
- US20090192460A1 US20090192460A1 US12/320,343 US32034309A US2009192460A1 US 20090192460 A1 US20090192460 A1 US 20090192460A1 US 32034309 A US32034309 A US 32034309A US 2009192460 A1 US2009192460 A1 US 2009192460A1
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- United States
- Prior art keywords
- locking
- dispensing
- dispensing piston
- handling portion
- syringe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000002360 preparation method Methods 0.000 claims 1
- 206010052428 Wound Diseases 0.000 abstract description 10
- 208000027418 Wounds and injury Diseases 0.000 abstract description 10
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 210000001331 nose Anatomy 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 108010010803 Gelatin Proteins 0.000 description 1
- 230000001684 chronic effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000006072 paste Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
- B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
- B05C17/01—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like
- B05C17/0136—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like comprising an energy storing element, e.g. a spring, for exerting, e.g. when released, pressure on the material
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
- A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
- A61M5/1454—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons spring-actuated, e.g. by a clockwork
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/19—Syringes having more than one chamber, e.g. including a manifold coupling two parallelly aligned syringes through separate channels to a common discharge assembly
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
- B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
- B05C17/00553—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with means allowing the stock of material to consist of at least two different components
Definitions
- the invention relates to a device having a dispensing piston that is actuatable by a pressure medium for dispensing a syringe and a guide portion within which the dispensing piston is displaceably supported.
- a dispensing syringe of this kind with a hypodermic needle is known from U.S. Pat. No. 2,565,081 where the device comprises an actuator that is actuatable by a compression spring and a guide portion within which the dispensing plunger is displaceable.
- the actuator is held in its tensioned position by a locking catch at its rear end and pressed onto the plunger of the syringe when the locking catch is released. During this operation, the spring expands once.
- U.S. Pat. No. 3,702,608 discloses a dispensing assembly having a portion for receiving a single syringe at its end opposite the outlet and a relatively complicated dispensing mechanism.
- WO 99/37343 also discloses a dispensing assembly that is capable of receiving a single syringe and has a relatively complicated releasing mechanism.
- liquids, pastes, and gelatin are also used which in combination with other substances allow sealing and healing of wounds and pain relief.
- multicomponent substances are increasingly being used which, however, have to be combined and mixed prior to their application to the wound.
- the components are e.g. stored in a double syringe and mixed by means of a static mixer or a spray system prior to their application to the skin or wound surface. Dispensing of the mixture is achieved by applying manual pressure to the plunger of the double syringe.
- an autonomous wound treatment by the patient is not only desirable but also cost-saving.
- the dispensing operation requires a force and a certain manual ability of the patient that should not be underestimated.
- the invention is based on the object of further developing a device of the kind mentioned in the introduction in such a manner that it allows the use of multiple syringes and can be produced inexpensively while ensuring an improved handling by patients.
- Another object of the invention is to allow a repeated use of the device and an accurate metering of any dispensed quantities.
- a device which is configured to receive and dispense a multiple syringe or cartridge, includes a handling portion for receiving the pressure medium, the dispensing piston, and the guide portion provided with a receiving flange for the multiple syringe, and comprises locking means that are releasable by applying manual pressure to the handling portion and are arranged on the handling portion and operatively connected to locking means provided on the dispensing piston.
- FIG. 1 shows an exploded view of a first exemplary embodiment of a device according to the invention for automated dispensing of a double syringe
- FIG. 1 d shows a perspective view of the assembled device according to FIG. 1 ;
- FIG. 1 a shows a perspective view of the handling portion of the device shown in FIG. 1 ;
- FIG. 1 b shows a perspective view of the locking sleeve of the device shown in FIG. 1 ;
- FIG. 1 c shows a different perspective view of the locking sleeve of FIG. 1 b;
- FIG. 2 shows a perspective view of a part of the device shown in FIG. 1 with the dispensing piston in the tensioned position;
- FIG. 3 shows a perspective view of the dispensing piston of FIG. 1 ;
- FIG. 4 shows a partly sectioned view according to plane IV-IV in FIG. 2 illustrating the locked position of the dispensing piston in the tensioned piston position;
- FIG. 5 shows a partly sectioned view according to plane V-V in FIG. 2 illustrating the released position of the locking sleeve
- FIG. 6 shows a perspective view of a second exemplary embodiment of a device according to the invention with a double syringe for automated dispensing
- FIG. 7 shows a section according to plane VII-VII in FIG. 6 in a tensioned position of the dispensing piston
- FIG. 8 shows a section according to plane VIII-VIII in FIG. 6 in a released position of the dispensing piston.
- FIG. 1 shows a first embodiment of a dispensing device 1 according to the invention for a double syringe, comprising a dispensing piston 2 , a guide portion 3 , a spring element 4 that serves as the pressure medium, a handling portion 5 , and a locking sleeve 6 .
- Dispensing piston 2 has the form of a hollow cylinder 8 that is closed at its front end 2 a by a plunger support 9 and open at its rear end 2 b.
- a finger rest 7 is provided whose underside extends along a part of the circumference of hollow cylinder 8 and whose plane upper side extends essentially perpendicularly to the circumferential surface of hollow cylinder 8 .
- Finger rest 7 is insertable in a receiving slot 10 of hollow cylinder 8 and attachable therein, as appears in FIG. 1 and will be described in more detail in the following description.
- a serrated locking toothing 35 is provided along the underside of dispensing piston 2 .
- Locking toothing 35 extends over a distance that corresponds to the total stroke of the dispensing piston. In the illustrated position of dispensing piston 2 , the foremost tooth space 35 a of the locking toothing is located in the axial area of locking catch 30 .
- the inner side of locking catch 30 has a shape that is equivalent to that of the spaces of the toothing, thereby allowing a positive engagement of locking catch 30 in any one of toothing spaces 35 .
- guide portion 3 essentially consists of a hollow cylinder 12 whose open end 3 b is adapted to receive dispensing piston 2 .
- hollow cylinder 12 On the upper side of its circumferential surface, hollow cylinder 12 is provided with an opening 13 that extends over a large part of guide portion 3 longitudinally and whose width essentially corresponds to the attachment area of finger rest 7 on dispensing piston 2 and which further serves for receiving double plunger 55 . In this manner, an axial movement of dispensing piston 2 within guide portion 3 is possible while finger rest 7 protrudes from opening 13 .
- a forward stop shoulder 34 for locking sleeve 6 is defined by the width of the transversal wall portion along a part of the external circumference of guide portion 3 .
- the piston movement within guide portion 3 is limited by a receiving flange for syringe 15 at front end 3 a of guide portion 3 .
- This receiving flange for syringe 15 is in the form of a transversal wall that extends beyond the cylinder diameter on both sides and has a U-shaped recess in its central area in which a double syringe 50 and its double plunger 55 are insertable.
- an insertion opening 16 for the syringe flange of a double syringe is provided, as appears in FIG. 1 .
- Spring element 4 is formed of a cylindrically coiled compression spring whose front end 4 a is arranged in the interior of hollow cylinder 8 in such a manner that its rear end 4 b protrudes from the open rear end 2 b of dispensing piston 2 .
- FIG. 1 d illustrates an assembled device according to the invention with a double syringe 50 and a mixer 53 .
- the double syringe is actuated by means of a double plunger 55 and further comprises a retaining flange 54 and a thrust plate 57 .
- handling portion 5 also has an essentially cylindrical shape 18 whose front end 5 a is open and whose rear end 5 b is closed by an end wall 19 .
- the hollow interior of handling portion 5 widens from a stop collar 20 that extends circumferentially along the inner wall.
- Stepped stop collar 20 defines a forward receiving section 33 of handling portion 5 that is configured to receive rearward end section 3 c of guide portion 3 such that its rear end 3 b abuts against stepped stop collar 20 .
- respective positioning cams 21 a, b are arranged which extend in the forward direction from stepped stop collar 20 .
- two corresponding positioning slots 22 a, b are provided, thereby ensuring the correct orientation of guide portion 3 during its insertion into handling portion 5 .
- respective snap noses 23 a, b are arranged on the surface of rearward end section 3 c.
- Corresponding snap grooves 24 a, b are provided along the inner wall of receiving section 33 . In this manner, the assembly of components 3 , 5 establishes a non-detachable snap connection between snap noses 23 a, b and snap grooves 24 a, b.
- a cylindrical spring guide 25 is arranged in the central area of the hollow interior of handling portion 5 which essentially extends over its entire length in the axial direction and internally connects to end wall 19 . More specifically, the external diameter of cylindrical spring guide 25 essentially corresponds to the internal diameter of spring element 4 . In this manner, cylindrical spring guide 25 guides rear end 4 b of spring element 4 toward the inner side of end wall 19 , whereby spring element 4 is compressed during the assembly of components 2 , 3 , 4 , and 5 .
- a rearward stop shoulder 26 is arranged along cylindrical surface 18 and circumferentially projects behind receiving section 33 . Specifically, the stop shoulder is located at the front end of end section 5 c of handling portion 5 .
- locking sleeve 6 has an annular sleeve envelope 27 that is slidable over forward end section 5 c of handling portion 5 . Furthermore, as compared to the external diameter of end section 5 c, a slightly oval internal diameter of sleeve envelope 27 is provided whose largest dimension is located between the locking catch and the finger rest and allows a corresponding displacement.
- forward front face 28 of locking sleeve 6 rests against forward stop shoulder 34 of guide portion 3 . In this position, rear end 6 b of locking sleeve 6 abuts against rearward stop shoulder 26 of handling portion 5 .
- a locking catch 30 is arranged which extends radially inwards.
- a lateral aperture 32 that corresponds to locking catch 30 is provided in the forward end section 5 c of handling portion 5 . Due to the elliptical shape of the internal dimension of the locking sleeve and cylindrical surface 5 c, it is possible to move locking catch 30 toward lateral aperture 32 during the assembly of components 5 , 6 and subsequently engage locking catch 30 in lateral aperture 32 so that locking catch 30 projects into the hollow interior of handling portion 5 .
- an elastic pressure element 31 is arranged on the side of the inner wall of sleeve envelope 27 opposite locking catch 30 .
- Pressure element 31 causes a force to be applied to locking sleeve 6 in the opposite direction with respect to locking catch 30 in order to bring the latter into engagement with the locking toothing.
- a finger rest 29 is associated to elastic pressure element 31 .
- dispensing device 1 is shown in a sectioned view according to planes IV-IV and V-V in FIG. 2 .
- finger rest 29 is under the impact of the pressure element and thus, within its radial play, in the remote position from the forward end section 5 c of handling portion 5 .
- the inner side of locking catch 30 extends through aperture 32 into the interior of handling portion 5 . Therefore, locking catch 30 engages in one tooth space of the locking toothing 35 of dispensing piston 2 extending along the inner wall of handling portion 5 .
- locking catch 30 engages in forward tooth space 35 a.
- finger rest 29 is in a position that results from applying a manual pressure, in which it is displaced with respect to forward end section 5 c of handling portion 5 within its predetermined play.
- the serrated inner side of locking catch 30 is thus withdrawn from the interior of handling portion 5 , thereby releasing the locking means.
- locking sleeve 6 When the manual pressure applied to finger rest 29 is cancelled, locking sleeve 6 is returned to the closed position shown in FIG. 4 by the spring action of pressure element 31 . This causes an engagement thereof in the closest tooth space. Consequently, locking toothing 35 allows dispensing piston 2 to catch with handling portion 5 in different piston positions according to the requirements.
- FIG. 6 shows a second exemplary embodiment of a dispensing device 40 according to the invention in a perspective view. Those features which correspond to the first exemplary embodiment are designated by the same reference numerals. Further shown is a double syringe 50 that is suitable for use with dispensing device 1 , 40 .
- This variant essentially corresponds to the first exemplary embodiment while the main difference consists in a simplified locking and releasing mechanism and the dispensing operation cannot be interrupted.
- Device 40 comprises an elastic finger rest 36 whose rear end 36 b is rigidly connected to handling portion 5 in the area of its rear end 5 b and extends forwardly along cylindrical surface 18 up to front end 5 a of handling portion 5 .
- a locking catch 37 is arranged at the front end 36 a of finger rest 36 .
- the finger rest with the locking catch essentially has the function of locking sleeve 6 in the first embodiment 1 of the dispensing device.
- locking catch 37 is directed outwardly.
- a locking notch 41 that corresponds to locking catch 37 is provided on dispensing piston 2 .
- dispensing piston 2 has a location slot 10 in which finger rest 7 is insertable.
- the finger rest has a locking support 42 that extends above hollow cylinder 8 of dispensing piston 2 in the shape of an umbrella.
- locking notch 41 is arranged, see FIG. 7 .
- locking catch 37 When pressure is applied to pressure surface 38 of finger rest 36 , locking catch 37 is depressed and disengages from locking notch 41 . Due to the spring arm configuration of finger rest 36 , locking catch 37 is returned to its initial position when the manually applied pressure is cancelled while the wedge shape of locking catch 37 ensures its engagement in the rearward position when the appliance is reused at a later time.
- FIGS. 7 and 8 show sectioned perspective views of guide portion 2 according to section planes VII-VII and VIII-VIII in FIG. 6 in the tensioned and released positions.
- a locking toothing may also be provided with external locking means according to the second exemplary embodiment.
- locking means may be provided which comprise a locking catch on dispensing piston 2 and a locking toothing on handling portion 5 . It is further possible to provide an external locking means in the form of a locking catch on a locking sleeve or an internal locking means in the form of a locking bracket on the handling portion.
- a compressed air cartridge or other such pressure medium may be used as a pressure medium to facilitate self-dispensing.
Abstract
Description
- The invention relates to a device having a dispensing piston that is actuatable by a pressure medium for dispensing a syringe and a guide portion within which the dispensing piston is displaceably supported.
- A dispensing syringe of this kind with a hypodermic needle is known from U.S. Pat. No. 2,565,081 where the device comprises an actuator that is actuatable by a compression spring and a guide portion within which the dispensing plunger is displaceable. The actuator is held in its tensioned position by a locking catch at its rear end and pressed onto the plunger of the syringe when the locking catch is released. During this operation, the spring expands once.
- U.S. Pat. No. 3,702,608 discloses a dispensing assembly having a portion for receiving a single syringe at its end opposite the outlet and a relatively complicated dispensing mechanism.
- WO 99/37343 also discloses a dispensing assembly that is capable of receiving a single syringe and has a relatively complicated releasing mechanism.
- In the field of wound treatment, besides conventional dressing materials for sterile wound coverage, liquids, pastes, and gelatin are also used which in combination with other substances allow sealing and healing of wounds and pain relief. For this purpose, multicomponent substances are increasingly being used which, however, have to be combined and mixed prior to their application to the wound. To this end, the components are e.g. stored in a double syringe and mixed by means of a static mixer or a spray system prior to their application to the skin or wound surface. Dispensing of the mixture is achieved by applying manual pressure to the plunger of the double syringe.
- Particularly for long-term patients or in the case of chronic wounds, an autonomous wound treatment by the patient is not only desirable but also cost-saving. However, in a conventional double syringe, the dispensing operation requires a force and a certain manual ability of the patient that should not be underestimated. Depending on the location of the wound, it may be difficult for the patient to operate the double syringe.
- Furthermore, a possibility of metering the components to be dispensed is desirable, which is only insufficiently ensured by conventional double syringes.
- On this background, the invention is based on the object of further developing a device of the kind mentioned in the introduction in such a manner that it allows the use of multiple syringes and can be produced inexpensively while ensuring an improved handling by patients.
- Another object of the invention is to allow a repeated use of the device and an accurate metering of any dispensed quantities.
- These objects are attained by a device which is configured to receive and dispense a multiple syringe or cartridge, includes a handling portion for receiving the pressure medium, the dispensing piston, and the guide portion provided with a receiving flange for the multiple syringe, and comprises locking means that are releasable by applying manual pressure to the handling portion and are arranged on the handling portion and operatively connected to locking means provided on the dispensing piston.
- Further preferred embodiments of the invention are defined in the dependent claims.
- The invention will be explained in more detail hereinafter with reference to drawings of exemplary embodiments, where:
-
FIG. 1 shows an exploded view of a first exemplary embodiment of a device according to the invention for automated dispensing of a double syringe; -
FIG. 1 d shows a perspective view of the assembled device according toFIG. 1 ; -
FIG. 1 a shows a perspective view of the handling portion of the device shown inFIG. 1 ; -
FIG. 1 b shows a perspective view of the locking sleeve of the device shown inFIG. 1 ; -
FIG. 1 c shows a different perspective view of the locking sleeve ofFIG. 1 b; -
FIG. 2 shows a perspective view of a part of the device shown inFIG. 1 with the dispensing piston in the tensioned position; -
FIG. 3 shows a perspective view of the dispensing piston ofFIG. 1 ; -
FIG. 4 shows a partly sectioned view according to plane IV-IV inFIG. 2 illustrating the locked position of the dispensing piston in the tensioned piston position; -
FIG. 5 shows a partly sectioned view according to plane V-V inFIG. 2 illustrating the released position of the locking sleeve; -
FIG. 6 shows a perspective view of a second exemplary embodiment of a device according to the invention with a double syringe for automated dispensing; -
FIG. 7 shows a section according to plane VII-VII inFIG. 6 in a tensioned position of the dispensing piston; and -
FIG. 8 shows a section according to plane VIII-VIII inFIG. 6 in a released position of the dispensing piston. - Hereinafter, in the exemplary embodiments, double syringes are depicted and described, but multiple syringes or multiple cartridges having more than two storage containers are also encompassed, in which case the dispensing piston is adapted accordingly. The terms “front” and “rear” refer to the syringe outlet, which is on the front side.
-
FIG. 1 shows a first embodiment of adispensing device 1 according to the invention for a double syringe, comprising a dispensingpiston 2, aguide portion 3, aspring element 4 that serves as the pressure medium, ahandling portion 5, and alocking sleeve 6. - Dispensing
piston 2 according toFIGS. 1 and 3 has the form of ahollow cylinder 8 that is closed at itsfront end 2 a by aplunger support 9 and open at itsrear end 2 b. At thefront end 2 a of the external circumferential surface of dispensingpiston 2, afinger rest 7 is provided whose underside extends along a part of the circumference ofhollow cylinder 8 and whose plane upper side extends essentially perpendicularly to the circumferential surface ofhollow cylinder 8.Finger rest 7 is insertable in areceiving slot 10 ofhollow cylinder 8 and attachable therein, as appears inFIG. 1 and will be described in more detail in the following description. Along the underside of dispensingpiston 2, a serrated locking toothing 35 is provided. Locking toothing 35 extends over a distance that corresponds to the total stroke of the dispensing piston. In the illustrated position of dispensingpiston 2, theforemost tooth space 35 a of the locking toothing is located in the axial area oflocking catch 30. The inner side oflocking catch 30 has a shape that is equivalent to that of the spaces of the toothing, thereby allowing a positive engagement of locking catch 30 in any one of toothingspaces 35. - As appears in
FIG. 1 ,guide portion 3 essentially consists of ahollow cylinder 12 whoseopen end 3 b is adapted to receive dispensingpiston 2. On the upper side of its circumferential surface,hollow cylinder 12 is provided with anopening 13 that extends over a large part ofguide portion 3 longitudinally and whose width essentially corresponds to the attachment area offinger rest 7 on dispensingpiston 2 and which further serves for receivingdouble plunger 55. In this manner, an axial movement of dispensingpiston 2 withinguide portion 3 is possible while finger rest 7 protrudes from opening 13. Aforward stop shoulder 34 forlocking sleeve 6 is defined by the width of the transversal wall portion along a part of the external circumference ofguide portion 3. - The piston movement within
guide portion 3 is limited by a receiving flange forsyringe 15 atfront end 3 a ofguide portion 3. This receiving flange forsyringe 15 is in the form of a transversal wall that extends beyond the cylinder diameter on both sides and has a U-shaped recess in its central area in which adouble syringe 50 and itsdouble plunger 55 are insertable. On the upper edge oflocation flange 15, an insertion opening 16 for the syringe flange of a double syringe is provided, as appears inFIG. 1 . Thus, during the actuation ofdouble plunger 55, the forward end position of dispensingpiston 2 insideguide portion 3 is attained at the end position point of the double plunger inside the double syringe. -
Spring element 4 is formed of a cylindrically coiled compression spring whosefront end 4 a is arranged in the interior ofhollow cylinder 8 in such a manner that itsrear end 4 b protrudes from the openrear end 2 b of dispensingpiston 2. -
FIG. 1 d illustrates an assembled device according to the invention with adouble syringe 50 and amixer 53. The double syringe is actuated by means of adouble plunger 55 and further comprises aretaining flange 54 and athrust plate 57. - According to
FIG. 1 a, handlingportion 5 also has an essentiallycylindrical shape 18 whosefront end 5 a is open and whoserear end 5 b is closed by anend wall 19. In the forward section, the hollow interior of handlingportion 5 widens from astop collar 20 that extends circumferentially along the inner wall. - Stepped
stop collar 20 defines aforward receiving section 33 ofhandling portion 5 that is configured to receiverearward end section 3 c ofguide portion 3 such that itsrear end 3 b abuts againststepped stop collar 20. On two opposed sides of the inner wall of receivingsection 33,respective positioning cams 21 a, b are arranged which extend in the forward direction from steppedstop collar 20. - Accordingly, in the
rearward end section 3 c ofguide portion 3, twocorresponding positioning slots 22 a, b are provided, thereby ensuring the correct orientation ofguide portion 3 during its insertion intohandling portion 5. On two opposed sides ofguide portion 3, respective snap noses 23 a, b are arranged on the surface ofrearward end section 3 c. Correspondingsnap grooves 24 a, b are provided along the inner wall of receivingsection 33. In this manner, the assembly ofcomponents grooves 24 a, b. - A
cylindrical spring guide 25 is arranged in the central area of the hollow interior of handlingportion 5 which essentially extends over its entire length in the axial direction and internally connects to endwall 19. More specifically, the external diameter ofcylindrical spring guide 25 essentially corresponds to the internal diameter ofspring element 4. In this manner,cylindrical spring guide 25 guidesrear end 4 b ofspring element 4 toward the inner side ofend wall 19, wherebyspring element 4 is compressed during the assembly ofcomponents - A
rearward stop shoulder 26 is arranged alongcylindrical surface 18 and circumferentially projects behind receivingsection 33. Specifically, the stop shoulder is located at the front end ofend section 5 c of handlingportion 5. - According to
FIGS. 1 b and 1 c, lockingsleeve 6 has anannular sleeve envelope 27 that is slidable overforward end section 5 c of handlingportion 5. Furthermore, as compared to the external diameter ofend section 5 c, a slightly oval internal diameter ofsleeve envelope 27 is provided whose largest dimension is located between the locking catch and the finger rest and allows a corresponding displacement. After its assembly, forward front face 28 of lockingsleeve 6 rests againstforward stop shoulder 34 ofguide portion 3. In this position, rear end 6 b of lockingsleeve 6 abuts againstrearward stop shoulder 26 of handlingportion 5. - Along the inner wall of
sleeve envelope 27, a lockingcatch 30 is arranged which extends radially inwards. Alateral aperture 32 that corresponds to lockingcatch 30 is provided in theforward end section 5 c of handlingportion 5. Due to the elliptical shape of the internal dimension of the locking sleeve andcylindrical surface 5 c, it is possible to move lockingcatch 30 towardlateral aperture 32 during the assembly ofcomponents catch 30 inlateral aperture 32 so that lockingcatch 30 projects into the hollow interior of handlingportion 5. - According to
FIG. 1 c, anelastic pressure element 31 is arranged on the side of the inner wall ofsleeve envelope 27 opposite lockingcatch 30.Pressure element 31 causes a force to be applied to lockingsleeve 6 in the opposite direction with respect to lockingcatch 30 in order to bring the latter into engagement with the locking toothing. On the outside of the sleeve, afinger rest 29 is associated toelastic pressure element 31. By applying pressure to this finger rest,pressure element 31 and thus lockingsleeve 6 along with lockingcatch 30 are disengaged within their radial play from lockingtoothing 35 on the underside of dispensingpiston 2, thereby releasing the dispensing piston. - In
FIGS. 4 and 5 , dispensingdevice 1 is shown in a sectioned view according to planes IV-IV and V-V inFIG. 2 . In the closed position of lockingsleeve 6 shown inFIG. 4 ,finger rest 29 is under the impact of the pressure element and thus, within its radial play, in the remote position from theforward end section 5 c of handlingportion 5. In this position, the inner side of lockingcatch 30 extends throughaperture 32 into the interior of handlingportion 5. Therefore, lockingcatch 30 engages in one tooth space of the lockingtoothing 35 of dispensingpiston 2 extending along the inner wall of handlingportion 5. In the rearward end position of dispensingpiston 2 shown here, lockingcatch 30 engages inforward tooth space 35 a. By the thus formed locking means, dispensingpiston 2 is retained in its axial position with respect to handlingportion 5 and against the force applied thereto byspring element 4. - In the releasing position of locking
sleeve 6 shown inFIG. 5 ,finger rest 29 is in a position that results from applying a manual pressure, in which it is displaced with respect toforward end section 5 c of handlingportion 5 within its predetermined play. The serrated inner side of lockingcatch 30 is thus withdrawn from the interior of handlingportion 5, thereby releasing the locking means. - When the manual pressure applied to
finger rest 29 is cancelled, lockingsleeve 6 is returned to the closed position shown inFIG. 4 by the spring action ofpressure element 31. This causes an engagement thereof in the closest tooth space. Consequently, lockingtoothing 35 allows dispensingpiston 2 to catch with handlingportion 5 in different piston positions according to the requirements. - Manually returning
dispensing piston 2 rearwardly is possible from any piston position by applying pressure to fingerrest surface 11 offinger rest 7 for the wedge-shaped configuration of lockingcatch 30 and of lockingtoothing 35, respectively, allows a rearward disengagement of lockingcatch 30 from a tooth space. -
FIG. 6 shows a second exemplary embodiment of a dispensingdevice 40 according to the invention in a perspective view. Those features which correspond to the first exemplary embodiment are designated by the same reference numerals. Further shown is adouble syringe 50 that is suitable for use with dispensingdevice - This variant essentially corresponds to the first exemplary embodiment while the main difference consists in a simplified locking and releasing mechanism and the dispensing operation cannot be interrupted.
-
Device 40 comprises anelastic finger rest 36 whoserear end 36 b is rigidly connected to handlingportion 5 in the area of itsrear end 5 b and extends forwardly alongcylindrical surface 18 up tofront end 5 a of handlingportion 5. At thefront end 36 a offinger rest 36, a lockingcatch 37 is arranged. Here, the finger rest with the locking catch essentially has the function of lockingsleeve 6 in thefirst embodiment 1 of the dispensing device. In this embodiment, in contrast to the first exemplary embodiment, lockingcatch 37 is directed outwardly. - A locking
notch 41 that corresponds to lockingcatch 37 is provided on dispensingpiston 2. At its front end, dispensingpiston 2 has alocation slot 10 in whichfinger rest 7 is insertable. The finger rest has a lockingsupport 42 that extends abovehollow cylinder 8 of dispensingpiston 2 in the shape of an umbrella. On the underside of lockingsupport 42, lockingnotch 41 is arranged, seeFIG. 7 . - When pressure is applied to pressure
surface 38 offinger rest 36, lockingcatch 37 is depressed and disengages from lockingnotch 41. Due to the spring arm configuration offinger rest 36, lockingcatch 37 is returned to its initial position when the manually applied pressure is cancelled while the wedge shape of lockingcatch 37 ensures its engagement in the rearward position when the appliance is reused at a later time. -
FIGS. 7 and 8 show sectioned perspective views ofguide portion 2 according to section planes VII-VII and VIII-VIII inFIG. 6 in the tensioned and released positions. - From the description of the exemplary embodiments, various modifications are accessible to those skilled in the art without departing from the protective scope of the invention, which is defined by the claims. Thus, a locking toothing may also be provided with external locking means according to the second exemplary embodiment. In this manner, by simply canceling the manually applied pressure, it is possible to lock the dispensing piston in a locking means at any time during dispensing. Furthermore, locking means may be provided which comprise a locking catch on dispensing
piston 2 and a locking toothing on handlingportion 5. It is further possible to provide an external locking means in the form of a locking catch on a locking sleeve or an internal locking means in the form of a locking bracket on the handling portion. Also, instead of a compression spring, a compressed air cartridge or other such pressure medium may be used as a pressure medium to facilitate self-dispensing.
Claims (12)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH0124/08 | 2008-01-29 | ||
CH1242008 | 2008-01-29 | ||
CH00124/08 | 2008-01-29 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20090192460A1 true US20090192460A1 (en) | 2009-07-30 |
US8038651B2 US8038651B2 (en) | 2011-10-18 |
Family
ID=39322617
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/320,343 Expired - Fee Related US8038651B2 (en) | 2008-01-29 | 2009-01-23 | Device with pressure-actuated pistons for dispensing a multiple syringe or multiple cartridge |
Country Status (3)
Country | Link |
---|---|
US (1) | US8038651B2 (en) |
EP (1) | EP2085147B1 (en) |
JP (1) | JP2009178554A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130310746A1 (en) * | 2010-12-22 | 2013-11-21 | Owen Mumford Limited | Autoinjectors |
US10231846B2 (en) | 2016-08-19 | 2019-03-19 | Stryker European Holdings I, Llc | Bone graft delivery loading assembly |
EP3760259A4 (en) * | 2018-03-28 | 2021-04-28 | TERUMO Kabushiki Kaisha | Gasket pressing tool and liquid medicine administration tool using same |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US9889465B2 (en) * | 2012-12-03 | 2018-02-13 | Sulzer Mixpac Ag | Dispensing apparatus |
BR112017008878B1 (en) | 2014-10-28 | 2022-10-11 | Bayer Healthcare Llc | PRESSURE SHIRT |
US11129934B2 (en) | 2014-10-28 | 2021-09-28 | Bayer Healthcare Llc | Self-orienting pressure jacket and pressure jacket-to-injector interface |
NO2689315T3 (en) | 2014-10-28 | 2018-04-14 | ||
US9199033B1 (en) | 2014-10-28 | 2015-12-01 | Bayer Healthcare Llc | Self-orienting syringe and syringe interface |
CN108472433B (en) | 2015-11-13 | 2021-12-14 | 拜耳医药保健有限公司 | Nested syringe assembly |
US11191893B2 (en) | 2018-01-31 | 2021-12-07 | Bayer Healthcare Llc | System and method for syringe engagement with injector |
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DE102005048871A1 (en) * | 2005-10-12 | 2007-04-19 | Böhner, Andreas | Device for appropriate emptying of medicinal ampoules e.g. for needleless injection under skin, has locking pin and releasing of size cylinder takes place through broadening which unlock locking device after putting ampoules on skin |
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- 2009-01-12 EP EP09405004A patent/EP2085147B1/en not_active Not-in-force
- 2009-01-23 US US12/320,343 patent/US8038651B2/en not_active Expired - Fee Related
- 2009-01-28 JP JP2009016454A patent/JP2009178554A/en active Pending
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US2565081A (en) * | 1948-09-15 | 1951-08-21 | Emma C Maynes | Device for operating hypodermic syringes |
US3702609A (en) * | 1968-11-21 | 1972-11-14 | Maurice Steiner | Hypodermic syringes, in particular self-injecting syringes |
US3702608A (en) * | 1970-12-15 | 1972-11-14 | Robert C Tibbs | Painless injection device with powered plunger |
US5584815A (en) * | 1993-04-02 | 1996-12-17 | Eli Lilly And Company | Multi-cartridge medication injection device |
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US20130310746A1 (en) * | 2010-12-22 | 2013-11-21 | Owen Mumford Limited | Autoinjectors |
US9821115B2 (en) * | 2010-12-22 | 2017-11-21 | Owen Mumford Limited | Autoinjectors |
US10231846B2 (en) | 2016-08-19 | 2019-03-19 | Stryker European Holdings I, Llc | Bone graft delivery loading assembly |
US10857001B2 (en) | 2016-08-19 | 2020-12-08 | Stryker European Holdings I, Llc | Bone graft delivery loading assembly |
US11666456B2 (en) | 2016-08-19 | 2023-06-06 | Stryker European Operations Holdings Llc | Bone graft delivery loading assembly |
EP3760259A4 (en) * | 2018-03-28 | 2021-04-28 | TERUMO Kabushiki Kaisha | Gasket pressing tool and liquid medicine administration tool using same |
Also Published As
Publication number | Publication date |
---|---|
JP2009178554A (en) | 2009-08-13 |
EP2085147A1 (en) | 2009-08-05 |
EP2085147B1 (en) | 2012-04-04 |
US8038651B2 (en) | 2011-10-18 |
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